How do I perform a static pressure check on the Infinity Thermostat?

A static pressure check is automatically performed at initial installation or when INSTALL is run in the INSTALL/SERVICE menu. The check takes about 1½ minutes to complete, during which the system measures the static pressure across the equipment at the expected highest delivered airflow. The results display in inches of water at the measured CFM. If the blower RPM is greater than 1200, a warning will appear, but equipment operation and dirty filter detection will not be affected.